The Last Word with Lawrence O'Donnell 03/22/12

Thousands attend Trayvon Martin rally

More than 20,000 people gathered in Sanford, Florida to demand justice in the killing of Trayvon Martin. Mark Thompson, host of Make It Plain on SiriusXM Radio, and Toure, a contributor to Time.com, join The Last Word to discuss. ... more Duration: {{video.duration.momentjs}}